Javidx9
7 years ago
committed by
GitHub
parent
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commit
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/*
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OneLoneCoder.com - Code-It-Yourself! Simple Tile Based Platform Game |
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"Its-a meee-a Jario!" - @Javidx9 |
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Disclaimer |
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~~~~~~~~~~ |
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I don't care what you use this for. It's intended to be educational, and perhaps |
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to the oddly minded - a little bit of fun. Please hack this, change it and use it |
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in any way you see fit. BUT, you acknowledge that I am not responsible for anything |
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bad that happens as a result of your actions. However, if good stuff happens, I |
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would appreciate a shout out, or at least give the blog some publicity for me. |
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Cheers! |
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Background |
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~~~~~~~~~~ |
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Tile maps are fundamental to most 2D games. This program explores emulating a classic 2D platformer |
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using floating point truncation to implement robust collision between a moving tile and a tilemap |
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representing the level. |
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Controls |
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~~~~~~~~ |
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Left and Right arrow keys move Jario, Space bar jumps.
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(Up and Down also move jario) |
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Author |
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~~~~~~ |
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Twitter: @javidx9 |
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Blog: www.onelonecoder.com |
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YouTube: www.youtube.com/javidx9 |
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Discord: https://discord.gg/WhwHUMV
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Video: |
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~~~~~~ |
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https://youtu.be/oJvJZNyW_rw
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Last Updated: 04/02/2018 |
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*/ |
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#include <iostream> |
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#include <string> |
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using namespace std; |
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#include "olcConsoleGameEngine.h" |
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class OneLoneCoder_Platformer : public olcConsoleGameEngine |
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{ |
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public: |
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OneLoneCoder_Platformer() |
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{ |
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m_sAppName = L"Tile Based Platform Game"; |
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} |
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private: |
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// Level storage
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wstring sLevel; |
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int nLevelWidth; |
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int nLevelHeight; |
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// Player Properties
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float fPlayerPosX = 1.0f; |
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float fPlayerPosY = 1.0f; |
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float fPlayerVelX = 0.0f; |
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float fPlayerVelY = 0.0f; |
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bool bPlayerOnGround = false; |
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// Camera properties
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float fCameraPosX = 0.0f; |
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float fCameraPosY = 0.0f; |
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// Sprite Resources
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olcSprite *spriteTiles = nullptr; |
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olcSprite *spriteMan = nullptr; |
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// Sprite selection flags
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int nDirModX = 0; |
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int nDirModY = 0; |
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protected: |
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virtual bool OnUserCreate() |
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{ |
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nLevelWidth = 64; |
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nLevelHeight = 16; |
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sLevel += L"................................................................"; |
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sLevel += L"................................................................"; |
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sLevel += L".......ooooo...................................................."; |
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sLevel += L"........ooo....................................................."; |
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sLevel += L".......................########................................."; |
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sLevel += L".....BB?BBBB?BB.......###..............#.#......................"; |
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sLevel += L"....................###................#.#......................"; |
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sLevel += L"...................####........................................."; |
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sLevel += L"GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG.##############.....########"; |
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sLevel += L"...................................#.#...............###........"; |
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sLevel += L"........................############.#............###..........."; |
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sLevel += L"........................#............#.........###.............."; |
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sLevel += L"........................#.############......###................."; |
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sLevel += L"........................#................###...................."; |
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sLevel += L"........................#################......................."; |
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sLevel += L"................................................................"; |
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spriteTiles = new olcSprite(L"JarioSprites/leveljario.spr"); |
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spriteMan = new olcSprite(L"JarioSprites/minijario.spr"); |
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return true; |
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} |
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virtual bool OnUserUpdate(float fElapsedTime) |
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{ |
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// Utility Lambdas
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auto GetTile = [&](int x, int y) |
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{ |
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if (x >= 0 && x < nLevelWidth && y >= 0 && y < nLevelHeight) |
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return sLevel[y * nLevelWidth + x]; |
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else |
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return L' '; |
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}; |
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auto SetTile = [&](int x, int y, wchar_t c) |
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{ |
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if (x >= 0 && x < nLevelWidth && y >= 0 && y < nLevelHeight) |
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sLevel[y*nLevelWidth + x] = c; |
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}; |
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//fPlayerVelX = 0.0f;
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//fPlayerVelY = 0.0f;
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// Handle Input
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if (IsFocused()) |
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{ |
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if (GetKey(VK_UP).bHeld) |
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{ |
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fPlayerVelY = -6.0f; |
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} |
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if (GetKey(VK_DOWN).bHeld) |
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{ |
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fPlayerVelY = 6.0f; |
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} |
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if (GetKey(VK_LEFT).bHeld) |
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{ |
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fPlayerVelX += (bPlayerOnGround ? -25.0f : -15.0f) * fElapsedTime; |
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nDirModY = 1; |
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} |
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if (GetKey(VK_RIGHT).bHeld) |
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{ |
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fPlayerVelX += (bPlayerOnGround ? 25.0f : 15.0f) * fElapsedTime; |
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nDirModY = 0; |
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} |
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if (GetKey(VK_SPACE).bPressed) |
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{ |
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if (fPlayerVelY == 0) |
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{ |
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fPlayerVelY = -12.0f; |
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nDirModX = 1; |
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} |
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} |
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} |
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// Gravity
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fPlayerVelY += 20.0f * fElapsedTime; |
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// Drag
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if (bPlayerOnGround) |
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{ |
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fPlayerVelX += -3.0f * fPlayerVelX * fElapsedTime; |
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if (fabs(fPlayerVelX) < 0.01f) |
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fPlayerVelX = 0.0f; |
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} |
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// Clamp velocities
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if (fPlayerVelX > 10.0f) |
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fPlayerVelX = 10.0f; |
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if (fPlayerVelX < -10.0f) |
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fPlayerVelX = -10.0f; |
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if (fPlayerVelY > 100.0f) |
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fPlayerVelY = 100.0f; |
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if (fPlayerVelY < -100.0f) |
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fPlayerVelY = -100.0f; |
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// Calculate potential new position
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float fNewPlayerPosX = fPlayerPosX + fPlayerVelX * fElapsedTime; |
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float fNewPlayerPosY = fPlayerPosY + fPlayerVelY * fElapsedTime; |
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// Check for pickups!
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if (GetTile(fNewPlayerPosX + 0.0f, fNewPlayerPosY + 0.0f) == L'o') |
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SetTile(fNewPlayerPosX + 0.0f, fNewPlayerPosY + 0.0f, L'.'); |
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if (GetTile(fNewPlayerPosX + 0.0f, fNewPlayerPosY + 1.0f) == L'o') |
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SetTile(fNewPlayerPosX + 0.0f, fNewPlayerPosY + 1.0f, L'.'); |
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if (GetTile(fNewPlayerPosX + 1.0f, fNewPlayerPosY + 0.0f) == L'o') |
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SetTile(fNewPlayerPosX + 1.0f, fNewPlayerPosY + 0.0f, L'.'); |
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if (GetTile(fNewPlayerPosX + 1.0f, fNewPlayerPosY + 1.0f) == L'o') |
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SetTile(fNewPlayerPosX + 1.0f, fNewPlayerPosY + 1.0f, L'.'); |
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// Check for Collision
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if (fPlayerVelX <= 0) // Moving Left
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{ |
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if (GetTile(fNewPlayerPosX + 0.0f, fPlayerPosY + 0.0f) != L'.' || GetTile(fNewPlayerPosX + 0.0f, fPlayerPosY + 0.9f) != L'.') |
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{ |
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fNewPlayerPosX = (int)fNewPlayerPosX + 1; |
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fPlayerVelX = 0; |
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} |
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} |
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else // Moving Right
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{ |
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if (GetTile(fNewPlayerPosX + 1.0f, fPlayerPosY + 0.0f) != L'.' || GetTile(fNewPlayerPosX + 1.0f, fPlayerPosY + 0.9f) != L'.') |
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{ |
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fNewPlayerPosX = (int)fNewPlayerPosX; |
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fPlayerVelX = 0; |
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} |
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} |
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bPlayerOnGround = false; |
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if (fPlayerVelY <= 0) // Moving Up
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{ |
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if (GetTile(fNewPlayerPosX + 0.0f, fNewPlayerPosY) != L'.' || GetTile(fNewPlayerPosX + 0.9f, fNewPlayerPosY) != L'.') |
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{ |
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fNewPlayerPosY = (int)fNewPlayerPosY + 1; |
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fPlayerVelY = 0; |
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} |
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} |
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else // Moving Down
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{ |
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if (GetTile(fNewPlayerPosX + 0.0f, fNewPlayerPosY + 1.0f) != L'.' || GetTile(fNewPlayerPosX + 0.9f, fNewPlayerPosY + 1.0f) != L'.') |
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{ |
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fNewPlayerPosY = (int)fNewPlayerPosY; |
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fPlayerVelY = 0; |
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bPlayerOnGround = true; // Player has a solid surface underfoot
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nDirModX = 0; |
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} |
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} |
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// Apply new position
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fPlayerPosX = fNewPlayerPosX; |
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fPlayerPosY = fNewPlayerPosY; |
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// Link camera to player position
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fCameraPosX = fPlayerPosX; |
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fCameraPosY = fPlayerPosY; |
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// Draw Level
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int nTileWidth = 16; |
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int nTileHeight = 16; |
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int nVisibleTilesX = ScreenWidth() / nTileWidth; |
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int nVisibleTilesY = ScreenHeight() / nTileHeight; |
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// Calculate Top-Leftmost visible tile
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float fOffsetX = fCameraPosX - (float)nVisibleTilesX / 2.0f; |
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float fOffsetY = fCameraPosY - (float)nVisibleTilesY / 2.0f; |
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// Clamp camera to game boundaries
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if (fOffsetX < 0) fOffsetX = 0; |
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if (fOffsetY < 0) fOffsetY = 0; |
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if (fOffsetX > nLevelWidth - nVisibleTilesX) fOffsetX = nLevelWidth - nVisibleTilesX; |
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if (fOffsetY > nLevelHeight - nVisibleTilesY) fOffsetY = nLevelHeight - nVisibleTilesY; |
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// Get offsets for smooth movement
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float fTileOffsetX = (fOffsetX - (int)fOffsetX) * nTileWidth; |
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float fTileOffsetY = (fOffsetY - (int)fOffsetY) * nTileHeight; |
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// Draw visible tile map
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for (int x = -1; x < nVisibleTilesX + 1; x++) |
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{ |
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for (int y = -1; y < nVisibleTilesY + 1; y++) |
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{ |
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wchar_t sTileID = GetTile(x + fOffsetX, y + fOffsetY); |
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switch (sTileID) |
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{ |
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case L'.': // Sky
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Fill(x * nTileWidth - fTileOffsetX, y * nTileHeight - fTileOffsetY, (x + 1) * nTileWidth - fTileOffsetX, (y + 1) * nTileHeight - fTileOffsetY, PIXEL_SOLID, FG_CYAN); |
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break; |
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case L'#': // Solid Block
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//Fill(x * nTileWidth - fTileOffsetX, y * nTileHeight - fTileOffsetY, (x + 1) * nTileWidth - fTileOffsetX, (y + 1) * nTileHeight - fTileOffsetY, PIXEL_SOLID, FG_RED);
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DrawPartialSprite(x * nTileWidth - fTileOffsetX, y * nTileHeight - fTileOffsetY, spriteTiles, 2 * nTileWidth, 0 * nTileHeight, nTileWidth, nTileHeight); |
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break; |
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case L'G': // Ground Block
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DrawPartialSprite(x * nTileWidth - fTileOffsetX, y * nTileHeight - fTileOffsetY, spriteTiles, 0 * nTileWidth, 0 * nTileHeight, nTileWidth, nTileHeight); |
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break; |
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case L'B': // Brick Block
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DrawPartialSprite(x * nTileWidth - fTileOffsetX, y * nTileHeight - fTileOffsetY, spriteTiles, 0 * nTileWidth, 1 * nTileHeight, nTileWidth, nTileHeight); |
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break; |
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case L'?': // Question Block
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DrawPartialSprite(x * nTileWidth - fTileOffsetX, y * nTileHeight - fTileOffsetY, spriteTiles, 1 * nTileWidth, 1 * nTileHeight, nTileWidth, nTileHeight); |
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break; |
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case L'o': // Coin
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Fill(x * nTileWidth - fTileOffsetX, y * nTileHeight - fTileOffsetY, (x + 1) * nTileWidth - fTileOffsetX, (y + 1) * nTileHeight - fTileOffsetY, PIXEL_SOLID, FG_CYAN); |
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DrawPartialSprite(x * nTileWidth - fTileOffsetX, y * nTileHeight - fTileOffsetY, spriteTiles, 3 * nTileWidth, 0 * nTileHeight, nTileWidth, nTileHeight); |
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break; |
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default: |
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Fill(x * nTileWidth - fTileOffsetX, y * nTileHeight - fTileOffsetY, (x + 1) * nTileWidth - fTileOffsetX, (y + 1) * nTileHeight - fTileOffsetY, PIXEL_SOLID, FG_BLACK); |
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break; |
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} |
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} |
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} |
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// Draw Player
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//Fill((fPlayerPosX - fOffsetX) * nTileWidth, (fPlayerPosY - fOffsetY) * nTileWidth, (fPlayerPosX - fOffsetX + 1.0f) * nTileWidth, (fPlayerPosY - fOffsetY + 1.0f) * nTileHeight, PIXEL_SOLID, FG_GREEN);
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DrawPartialSprite((fPlayerPosX - fOffsetX) * nTileWidth, (fPlayerPosY - fOffsetY) * nTileWidth, spriteMan, nDirModX * nTileWidth, nDirModY * nTileHeight, nTileWidth, nTileHeight); |
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return true; |
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} |
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}; |
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int main() |
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{ |
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OneLoneCoder_Platformer game; |
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if (game.ConstructConsole(256, 240, 4, 4)) |
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game.Start(); |
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return 0; |
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} |
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